function showrack(id)
{
	for (var i=1;i<=2;i++)
	{
		document.getElementById('id_'+i).style.display='none';
		document.getElementById('id_'+i+'_description').style.display='none';
	}
	document.getElementById('id_'+id).style.display='block';
	document.getElementById('id_'+id+'_description').style.display='block';
}